std::resetiosflags (3) - Linux Manuals

std::resetiosflags: std::resetiosflags

NAME

std::resetiosflags - std::resetiosflags

Synopsis

Defined in header <iomanip>
/*unspecified*/ resetiosflags( std::ios_base::fmtflags mask );

When used in an expression out << resetiosflags(mask) or in >> resetiosflags(mask), clears all format flags of the stream out or in as specified by the mask.

Parameters

mask - bitmask of the flags to clear

Return value

Returns an object of unspecified type such that if str is the name of a stream of type std::basic_ostream<CharT, Traits> or std::basic_istream<CharT, Traits>, then the expression str << resetiosflags(mask) or str >> resetiosflags(mask) behaves as if the following code was executed:
str.setf(std::ios_base::fmtflags(0), mask);

Example

// Run this code

  #include <sstream>
  #include <iostream>
  #include <iomanip>
  int main()
  {
      std::istringstream in("10 010 10 010 10 010");
      int n1, n2;
      in >> std::oct >> n1 >> n2;
      std::cout << "Parsing \"10 010\" with std::oct gives: " << n1 << ' ' << n2 << '\n';
      in >> std::dec >> n1 >> n2;
      std::cout << "Parsing \"10 010\" with std::dec gives: " << n1 << ' ' << n2 << '\n';
      in >> std::resetiosflags(std::ios_base::basefield) >> n1 >> n2;
      std::cout << "Parsing \"10 010\" with autodetect gives: " << n1 << ' ' << n2 << '\n';
  }

Output:

  Parsing "10 010" with std::oct gives: 8 8
  Parsing "10 010" with std::dec gives: 10 10
  Parsing "10 010" with autodetect gives: 10 8